x_items = list(map(lambda x: x * x, [1, 2, 3, 4, 5, 6, 7, 8, 9]))
print(x_items)


def build(x, y):
    return lambda: x * x + y * y


f = build(1, 2)
print(f())

L = list(filter(lambda x: x % 2 == 1, range(1, 20)))
print(L)
